Bolster for railway cars



May 15, 1928.

P. R. DRENNING BOLSTER FOR RAILWAY CARS Filed March 22, 1926 Patented May 15, 1928.

LL. all I emsee PEKCYR. DR nNING, or BALTIMORE, MARYLAND, ASSIGNQR, BY MESNE ASSIGN- MEN'rs, ro T. H. SYMINGTON AND son,

PORATION or MARYLAND.

INC, OF BALTIMORE, MARYLAND, A COR- BoLs'rER non RAILWAY CARS.

Application Marc 1e22, Serial No.

Th inyei tien ears to begets for railtineereaker r he pbject of the, invention, gene-rally ange s ta er-g m a teeter, including a to; the outer member either 1 .9 5 i til i a lii new 9. ye tie y r 50th Wit respect theretqas the case maybe. ii f h i he, i n m mb ta witi the car is moyably mounted thare e t9 hOa m mb $0.35 to equalize the strains incident to ear movement. h nabie lt 3 he ti e i a tort a. elsteri innhit i ainfier me b he hm eng t d ialan er ment with sPQet hi the Merciambe as. .rwean t et euader ee ta n ei e m t n e e alt cur he o j t f, h n nt i tertd d eo nb l t r a t is. hafae ii which tb i iner {m be s r s li nt y .s pported with respect to the outer member, ireee a ve. at y hi in em wh .7 e edze ei st a yib n th e d. he1si e,.fmm t e ai pa r-Q team jme h r a he si e be ...b ih

ada ed, lL P far assiz and she- Qer 1 I to reglacethe present Iigld standard or conventional bolster.

additional 0 ag dfthe jiiwlia aji's to @FQXLQ a ed t i were; e st a this naturein whiclrthe nieans forsupportthe innemem atn y een) 9 .9 a esteem i numb bfhforms, i p e 11 11:: 4 11951 thf ee t ai rgnetu e o the .Q

e be e u pp d wit e-dam h s m .9 the se fv the estimated strain "to the st-ructure.

be placed upon a ear-a lment we. i ee in a i ethaesbis te pieivant the Y n io gq s s t e Qe wle i Qa t t n a t arrahgment a ridcOmbinatiOn nii rt's to be .hea ia iteme e ul y d cr bedfiadfi ii and illustrated in t e accompanying drawi fil a be ster' constructed in accordance with'one n important object is to provide a bolster form ofjthe invention; this i iew illustrating the use of lateral motion rollers, x

F igure 2 is a longitudinal section through a modified form of bolster in which the in- -l-' ner member spring supported and incapable of longitudinal movement, Figure 3 is a cross section taken on the line 33 off Figure 2, Figure 4 is a longitudinal section through another form of the invention showing the use of leaf springs, and I Figure 5 is a cross section on the line 55 of Figure 4. n

Referring more particularly to the drawings and especially to Figure 1, I haveshown a bolster designated generally by the numeral 1 and including a main body or outer member 2 preferably constructed to conform to the shape, dimensions andvother, requirements of a standard bolster, the intention being that the present devicebe capable of use in connection with ordinary and already \enisting truck side framesand other car v"parts Without necess1 tat ngany changes. in

the construction or arrangement thereof. The

er member are more or less immaterial especially as many yariat ons may be made depend ng upon the partlcularmake or type of trucks with which the device may be used.

Generally speaking, this outer member 2 may be said to be of hollow formation and provided at its top with an opening 3 and at its bottom with, pockets 4 located somewhat -near the ends.

{exact details of the construction of this out-,

member 5 is represented asiequipped near 7 or at its ends with; upstanding. .bracket .Inembrs 6 arrangedinQpz-rirs. and between Which are journaled sidelbearings formed as rollers 7. If preferred,,the. inner bolster may be proyided atcfthis pointwith .a -flat. bearing surface for the support of any existing form of friction or antifriction side bearing. At its centerthe member 5 is pro- ,Vided 'with a center bearing including a central projection 8 surrounded by a cirlOO movement with respect to the former, as

may be found desirable in certain circumstances or under various conditions. It is of course desirable that the surface 10 be of such shape that there will always be a tendency for the inner member 5 to center itself with respect to the mainor body member whcnever lateral strain is relieved, the device being consequently selfcentering while having the possibility of lateral motion. VVithinthe pockets 4 are mounted leaf springs 11 supported at their ends and constituting-bearings for the rollers 11 engaging'against the cam-like sur faces 10 at the bottom of the inner bolster member 5, these springs being preferably flush with the top surface of the bottom portionof the bolster. The leaf springs will operate to take up shocks, jars and vibrations,'as will be'readil'y apparent. Inas much as the springs fie): downwardly under strain there will always be a tendency for the roller-to center itself when a lateral surging tendency has ceased.

In certain types of cars it is not necessary for the inner memberto be longitudinally :novablewitli respect to the main or body member and in Figures 2 to 5 inclusive 1 have shown modifications in which cushioning means is provided for the inner member but in' which the inner member/is incapable of any 'movement other than vertical. Va

rious modifications and expedients may he resorted 'to and in Figures '2 and 5-3 I have shown the bolster as comprising an outer or main member 12 of hollow formation and having its top provided with an opening 13 within which islocated the inner member 14 having a. center bearing structure 15. Owingto the absence of longitudinal movement there is no necessity for the employment of rollers as in the first described form, but the end portions of the inner member 14 are provided with pockets or other abutment elements 16 engaged by coil springs 17 which rest upon the top surface ofthe bottom of the main or body member 1 2,'tl1'es'e springs acting to support the load and to provide resilience irrespective of that provided by the usual springs located within the window openings of the truck with which the device is used or in which it may be embodied- Near its ends the member 14i is provided at its upper surface with suitable recesses or other bearing elements or portions 18 within which are located side bearing' rollers 19 whichuiii'gl'it; of course, be cylindrical in shape as disclosed in Figure 1 or which may be tapered or frustoconical as illustrated in Figures 2 and 3.:

In Figures sand!) the construction-is the same except, that groups of leaf or plate springs 20 are provided in lieu of the helical springs'17 above described, the other features being the same and the operation being like-wise'the same as is the case with the form disclosed in Figures 2 and 2-3. 1

In all forms of the invent'ion'the operation is substantially the same and it willbe observed that the inner member'is mot-'ahle either longitudinally or vertically; or both, with respect to the outer member so as to accomplish the desired results.

While I have shown and described various embodiments of the invention, it should he understood that the disclosure is' merely illustrative as the right is reserved to make all such changes in the form, construction and arrangement of parts as' will not depart from the spirit of the invention or the scope of the claims "hereunto-appended.

Having thus described the invention, I claim:

1. In a railway car truck bolster, a main or body member' adaptedto replace a standard bolster and'provided withan opening, and an inner member located-within 'sa'ld opening and vertically movable with respect to the outer member, said inner member carrying a center bearing and side bearings,

and spring means located'benea'th the side bearings for opposing downward 'movernent of the inner member. i

2. In a railway car truck bolster, a main or body member adaptedtoreplace a standard bolster and provided with "an opening, an inner'meinb'erlocated withinsaid openingand movable vertically and longitudinally with. respect to the outer memberysai'd inner member carrying a cent erbearing and side bearings, and springs located beneath the side bearings forjopposing downward movement of the inner member. I

3. In a railway car truck bolster, an' elongated hollow body conforming to a standard bolster and provided in its top with a l ongitudinally' extending 0penin'g, an' :inner member located within said opening and proylded with center and'side bearings; and spring members located between [and abuttingagainst said main andjinner members at points beneath the side bearings for providing resilience 4, In arailway car truckbolster, an'el o'ngated body member adaptedto be mounted within the window openings 'of the side frames of a car truck and formed in' itstop with an opening, a" member located within the opening, rollers permitting movement of the inner member longitudinally with respect to the main member, and spring means beneath the rollers for opposing such movement.

5. In a railway car truck bolster, a main hollow body adapted to replace a standard bolster and provided in its top with an opening. an inner member of less length than said opening located therewithin and capable of movement longitudinally with respect to the main member. the underside of said inner member being provided near its (lids with curved bearing surfaces. the bottom of the main member being provided with recesses beneath the end portions of the inner member. a bank of plate springs located within each of said recesses. and rollers engaged between said bearing: surfaces and the banks of spring 6. In a railway car truck bolster, a main member having an opening in its top. an inner lflOlTllHBI mounted for vertical and longitudinal movement with in said opening,

rollers located beneath the ends of the inner member, and banks of plate springs located beneath said rollers.

7. In a railway car truck bolster, a main member having an opening in its top, an lIllQl member movable vertically and longiin-iinaily within said opening, rollers supportin; the ends of the inner member the main member having pockets, and banks of plate springgs located Within said pockets and upon which said rollers rest.

5*. in a railway car truck bolster, a main member having: an opening in its top, an inner member movable vertically and longitudinally within said opening. rollers support;- ing the ends of the inner member, the main m mber having pockets, and banks of plate springs located within said pockets and upon which said rollers rest, the tops of the banks of springs being tlush with the top surface of the bottom portion of the bolster.

In testimony whereof I affix my signature.

PERCY R. DRENNING. 

